6399374101 has 2 divisors, whose sum is σ = 6399374102. Its totient is φ = 6399374100.

The previous prime is 6399374099. The next prime is 6399374129. The reversal of 6399374101 is 1014739936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3811210225 + 2588163876 = 61735^2 + 50874^2 .

It is a cyclic number.

It is not a de Polignac number, because 6399374101 - 2¹ = 6399374099 is a prime.

Together with 6399374099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6399374161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199687050 + 3199687051.

It is an arithmetic number, because the mean of its divisors is an integer number (3199687051).

Almost surely, 2^6399374101 is an apocalyptic number.

It is an amenable number.

6399374101 is a deficient number, since it is larger than the sum of its proper divisors (1).

6399374101 is an equidigital number, since it uses as much as digits as its factorization.

6399374101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 6399374101 is about 79996.0880356033. The cubic root of 6399374101 is about 1856.5750071843.

The spelling of 6399374101 in words is "six billion, three hundred ninety-nine million, three hundred seventy-four thousand, one hundred one".